![McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-157sa-card.png?v=1794028444&width=1946)
![McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-157sa-specs.png?v=1794028445&width=1946)
McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap
McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap
Regular price
$2,337.36 USD
Regular price
Sale price
$2,337.36 USD
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Low stock: 4 left
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SKU:157S-A
View full details![McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap — New England Supply House spec card [NESH-SPEC-CARD-V2]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-157sa-card.png?v=1794028444&width=1445)
![McDonnell & Miller 157S-A Low Water Cutoff Switch, 1-1/4 in. Tap specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-157sa-specs.png?v=1794028445&width=1445)
The McDonnell & Miller 157S-A is a low water cutoff switch used to monitor boiler water level and shut down the burner if water drops too low. It connects via a 1-1/4 in. main tapping with a 3/4 in. gauge tap for mounting a water gauge or glass.
This is a genuine McDonnell & Miller replacement part. Confirm the part number against your equipment's parts list before ordering.
Specifications
| Part Number | 157S-A |
|---|---|
| Brand | McDonnell & Miller |
| Type | Low Water Cutoff Switch |
| Main Tapping | 1-1/4 in. |
| Gauge Tap | 3/4 in. |